Can't boot from snow leopard bootable hard drive on my new 27 imac

Hey guys
I have just bought a new 27in Imac with all possible upgrades.
I have an old 2.2 MBP running snow leopard. I used carbon copy clone to make a bootable clone.
It will boot from the hard drive on my MBP ( the one I cloned it from) but it will not boot on my Imac.
I can select it from the boot screen ( holding down alt) but after I select it I just get the apple logo and nothing happens.
Can anyone shed some light on this for me? I have looked through tones of forums but can't seem to fine the answer.
Will the new mountain lion not boot snow leopard? If it can boot windows I don't see why it wouldn't boot my clone.
Thanks in advance peeps

I don't think it is fixable. Your new Mac has come installed with Mountain Lion. My understanding, from what I've learned on these boards, is that a Mac cannot boot from an OS earlier than the one that was installed at point of manufacture. I believe it is to do with the firmware that is on later models.
It also means that you cannot install an OS earlier than the one the machine came with (apparently this can be worked around by installing an earlier OS in a Virtual Machine, like some people install Windows on their Macs. This is not something I've done, but a regualr poster on here MichaelLAX, I think, has described how it's possible).
If you're wanting to just erase and start afresh with the MBP surely you can do that with the clone? You don't need the iMac to do that.

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@Steve Holton: Sorry Steve, but you're wrong about that one . I'm using 10.8 (purchased and downloaded) on the internal HD of this MBP8,3 (2.2 GHz, 17"), and I am also able to boot into 10.7.4 and 10.6.8 from external FW800 partitions.
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As it says I replaced my internal WD 250gb drive in my late 2006 2.16ghz imac . I followed the tutorials on the net to the tee yet upon trying to boot from Snow Leopard after firing it back up all I get is the Apple logo and the timer . I've tried holding C to no avail . I've held Alt to select the OSX disc yet it still won't boot to get me to Disc Utility . I've even put the old hard drive back in . When I hold Alt on start up it shows the drive and the disc but will boot from neither when selected . I've tried to get the Snow Leopard disc to eject so I can try my originals but it won't even do that . I'm convinced I haven't damaged anything but I'm at my wits end ! Does anybody have any ideas how to get the Leopard disc out so I can at least try from my originals ? The drive I've installed is compatible it's a 1tb WD . I also triple checked all the connections and they all seam sound . Really appreciate your help lads as I wanted to give the iMac to my daughter when we get a new one .

You will first need to prep the new drive using Disk Utility on the original 10.4 Disc or Retail upgrade 10.6 DVD. It needs to be Partition GUID Partition Table and Format it Mac OS Extented (Journaled) before you can install and run OS X on it.
1. Boot from your SL install DVD or Bootable Clone and open Disk Utility.
2. Highlight the new HD in the list of drives and select the Partition tab.
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Yes, you can set up your external firewire HDD as an emergency boot drive.
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2. (Optional) I suggest you partition your HDD so that the first partition is roughly equivalent to the size of your internal HDD. The rest can be partitioned for other uses. (See Dr. Smoke's FAQ Backup and Recovery) For step-by-step for formatting and partitioning please post back).
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I already knew that I'm free to follow my own course, but thanks for giving me your permission (???)
And would knowing the original OS of the machine make any difference in your "advice"? If it was originally Leopard, would that make it any different than if it was Tiger? Answer: No, because you don't understand the problem, and you don't know how to fix it.
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If anyone ACTUALLY KNOWS anything about this problem, please post, as many others will benefit.
If you DON'T ACTUALLY KNOW anything about the problem, either DON'T POST HERE, or else qualify your information to indicate that you are guessing. I'm open to suggestions and speculation, but could you please CHECK YOUR EGO AT THE DOOR, and tell people that you are GUESSING what the problem might be. You don't need to act like you are some great authority and try to make your random guesswork look like an established fact.
If you were walking in New York City, and you ask someone how to get to Carnegie Hall, but the person doesn't even know where Carnegie Hall is, would you rather:
1) Have the person tell you a bunch of random wrong information that could cause you wander aimlessly for hours?
OR
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IF YOU DON'T KNOW THE ANSWER, THEN DON'T ANSWER.
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As your Mac is running Mac OS X 10.6, first open  > Software Update and install Mac OS X 10.6.8. This update will add the App Store, so open it and try purchasing Mountain Lion. If your Mac is compatible, the computer will start downloading Mountain Lion.
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^^ that's the main problem. Here's the full history.
I bought a new 13" i5 MBP, early 2011 edition. I had an old white Macbook 2.14 ghz core2duo on Snow Leopard. I attempted to port over my time machine backup, but encountered problems in that my User was inaccessible from the new computer after the import finished, and I had to go in and change the root password, etc, and for some reason or another, I couldn't install any programs at all from that administrator's account. By "couldn't" I mean I could install them, but upon installation they would never boot. So, I took it to the apple store and did a clean install from the most up to date Lion OSX. Then, I created a brand new admin account, instead of trying to import the old one, and things seemed great. Then, I just imported my old files from the TM backup, but not any system settings, permissions, or user data. Just my Docs, pics, vids, apps, and itunes stuff.
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Open Office (Office 2007-like suite compatible with OS X.)
NeoOffice (similar to Open Office.)
LibreOffice (a new direction for the Open Office suite.)

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Can't boot from snow leopard bootable hard drive on my new 27 imac

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